my belief gained through my travels on this subject is that good clocking and elimination of electrical noise pollution are both important... the importance of the latter highly is dependent on the nature of upstream signal feeds/routers and of course, one’s digital music source (multi use computer, streamer, renderer, what have you...)
it is not just about the integrity of the transmitted data packet info (the networking guys only focus on this, this is a necessary but insufficient condition for success in hifi reproduction), it is about how the data gets decoded accurately back into analog without distortions caused in the process (which requires proper timing and electrical properties of the waveform being read during the conversion...)